Ask the exterminator how long the company has been in business.
Ask the exterminator how long he or she has worked at the company.
Check with the Better Business Bureau to see if any complaints have been filed against the company.
Ask if the exterminator is a member of the National Pest Control Association as well as any local or state organizations.
Ask if the exterminator is an Accredited Wood Destroying Insect Inspector.
Check the exterminator's vehicle for official, professional lettering.
Be sure the exterminator has an office in your area.
Ask if the exterminator is part time or full time.
Ask if the exterminator's methods are approved by the National Pest Control Association's Approved Reference Procedure Manual.
Ask about guarantees. Be suspicious of any life time guarantees.
Ask for an annual maintenance quote in writing that includes termite services.
Ask to see an insurance certificate.
Ask for suggestions from friends and relatives. Real estate agents are also good sources.